I never compared the VW to a Cossie.... Likewise I never made a reference to vehicle age.
I was just suggesting that the reason why a VW beetle has never won time attack is due not to it being a bad car, but due to the fact there are better cars for that discipline, the same can be said for the Cosworth

The EVO, the Scoobys and others are simply better cars with regards to time attack and that's why the ford scene does not do as well.